Across
- 4. Daughter of Ares, enemy to Percy
- 5. Son of Mars, Hazel's love interest
- 6. Goddess of wisdom
- 11. Daughter of Hades, hunter of Artemis
- 16. Daughter of Pluto, Frank's love interest
- 19. Son of Hermes, host of Kronos
- 20. Cyclops, son of Poseidon, brother to Percy
- 21. Daughter of Athena, Percy's love interest
- 22. God of war
- 24. Daughter of Zeus, was a tree for a time, Jason's sister
- 25. Grover's love interest
- 26. Son of Poseidon, main character
- 27. Daughter of Atlas, stuck on an island, Leo's love interest
- 28. Daughter of Atlas, hunter of Artemis
- 30. God of the sea, Percy's father
- 31. Mortal who can see through the mist, hosts the spirit of the Oracle of Delphi
Down
- 1. Son of Apollo, Nico's love interest
- 2. Goddess of marriage, wife of Zeus
- 3. Goddess of love
- 7. God of the forge
- 8. Daughter of Aphrodite, Jason's love interest, later dates a girl
- 9. Son of Jupiter, Thalia's brother, Piper's love interest
- 10. Son of Hephaestus, Calypso's love interest
- 12. Son of Hades, Will's love interest
- 13. Daughter of Aphrodite, Charles' love interest
- 14. Son of Hephaestus, Selena's love interest
- 15. Goddess of agriculture
- 17. Apollo as a mortal
- 18. Satyr in the second series
- 23. Centaur, one of the leaders at CHB
- 29. Satyr that helps main character in the first series
